package com.hu.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.hu.reggie.common.R;
import com.hu.reggie.mapper.EmployeeMapper;
import com.hu.reggie.pojo.Employee;
import com.hu.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){

        // 1.将页面提交的密码进行md5加密
        String password=employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        // 2.根据页面提交的用户名查询数据库
        LambdaQueryWrapper<Employee> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        Employee emp=employeeService.getOne(queryWrapper);

        // 3.如果没有查询到则登录失败
        if (emp == null) {
            return R.error("登录失败");
        }
        //4.密码比对，如果不一致则返回登录失败结果
        if (!emp.getPassword().equals(password)){
            return R.error("登录失败");
        }
        //5.查看员工状态，如果为已禁用状态，则返回员工已禁用结果
        if (emp.getStatus()==0){
            return R.error("账号已禁用");
        }

        //6.登录成功，将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    // 员工退出
    @PostMapping("/logout")
    public R<String> logout(HttpServletRequest request){
        // 清空session
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    // 新增员工
    @PostMapping
    public R<String> save(HttpServletRequest request,@RequestBody Employee employee){
        log.info("新增员工，员工消息：{}",employee.toString());

        // 设置初始密码，需要md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
//        employee.setCreateTime(LocalDateTime.now());    // 创建这条数据的时间
//        employee.setUpdateTime(LocalDateTime.now());    // 更新这条数据的时间

        // 获取当前登录用户的id
        Long empId= (Long) request.getSession().getAttribute("employee");
//        employee.setCreateUser(empId);  // 创建这条数据的用户id
//        employee.setUpdateUser(empId);  // 更新这条数据的用户id
        try {
            employeeService.save(employee);
        }catch (Exception e){
            return R.error("新增员工失败");
        }

        log.info("新增员工，员工消息：{}",employee.toString());
        return R.success("新增员工成功");
    }


    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){     // Page类由MybatisPlus提供
        log.info("page={},pageSize={},name={}",page,pageSize,name);
        // 构造分页构造器
        Page pageInfo=new Page(page,pageSize);
        // 创建条件构造器
        LambdaQueryWrapper<Employee> queryWrapper=new LambdaQueryWrapper<Employee>();
        // 添加过滤条件,当name不为空时，添加该条件
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        // 排序
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        // 执行查询
        Page page1 = employeeService.page(pageInfo, queryWrapper);
        return R.success(pageInfo);
    }

    // 根据id修改员工信息
    @PutMapping
    public R<String> update(HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());
        // 获取当前用户id
        Long empId= (Long) request.getSession().getAttribute("employee");
        // 设置修改时间和修改人
        employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(empId);
        // 执行修改操作
        employeeService.updateById(employee);
        return R.success("员工信息修改成功");
    }

    // 根据id查询员工信息
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息");
        Employee employee=employeeService.getById(id);
        if (employee!=null){
            return R.success(employee);
        }else {
            return R.error("没有该员工");
        }
    }
}
